TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 107 of 1015
TM 9-2320-272-24-1
Table 2-1. Unit Preventive Maintenance Checks and Services (Contd).
ITEM TO
ITEM INTERVAL
CHECK
NOT FULLY
PROCEDURE
MISSION
NO.
SERVICE
CAPABLE IF:
20
Semi-
Air lines
a.
Inspect front service brake air lines and fittings
annual
and brake
for loose connections, cracks, splits, or damage that could
chambers
cause potential air leaks. Tighten loose air lines and
fittings connections, and replace any air line or fitting that
has cracks, splits, or damage that could cause potential
air leaks.
b.
Inspect front service brake chambers for condition and
security of mounting. Replace any service brake chamber
that is damaged, defective, or inoperative (para. 3-181).
NOTE
Inspection of CTIS air lines and fittings will be
accomplished over complete vehicle. Tighten, repair,
and/or replace components of the compressed air
system as required. If maintenance is required at a
higher level, records should reflect closest point of
reference to ensure proper identification of
components requiring service.
c.
On M939A2 series vehicles, inspect CTIS air lines and
fittings for loose connections, cracks, splits, or damage
that could cause potential air leaks.
21
Semi-
Steering
a.
Inspect steering knuckles, steering gear, tie rod
annual
system
assembly, steering arms, drag link, pitman arm, lower
steering gear shaft, and power steering cylinder for breaks,
cracks, rust, wear, and signs of unserviceable condition.
1.
Treat for corrosion of steering knuckles, tie rod
assembly, steering arms, drag link, pitman arm, or
steering gear shaft.
2.
Replace tie rod assembly, drag link, pitman arm,
lower steering gear shaft, or power steering cylinder if
broken, cracked, worn, or signs of an unserviceable
condition are present.
3.
If steering knuckles, steering arms, or steering
gear are broken, cracked, worn, or have other signs of an
unserviceable condition, notify DS maintenance.
2-19
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